Quote from suzanne4
Some new policies have come out in the US concerning the BCG that is given overseas to children:
The expected time that the person should give a positive Mantoux test based on that vaccine is less than twenty years, you should not remain positive forever from it. So now, when someone that received the BCG and has come to the US years later, and have a positive PPD, they are usually treated as they are considered having been in contact with someone that was positive and developed antibodies because of that.
The countries where you saw BCG predominantly used have had higher incidences of TB in the first place.
I used to work in a community health center where 99% of our patients were from developing countries & who had received the BCG. We also did immigration physicals (PPD is a requirement) for people from countries all over the world where BCG is given.
I have seen MANY MANY people with a hx of BCG whose PPDs were just as flat as mine; some were children who had received the BCG within recent history. So I will have to respectfully disagree with Shaun, though his/her clinical experience may be different than my own. (no hard feelings, ok?)
Thanks for posting the above, suzanne. You beat me to it.
I have measured many a +PPD and I did it the same way yours was done, GingerSue. What constitutes positive depends on your situation. But do get your CXR if it's recommended...just in case.
Something anecdotal: I have seen several cases where someone will have a +PPD one year, then forget and have one placed the next (I know, how do you forget....) that turns up neg. Go figure.